EP2593739B1 - Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement - Google Patents

Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement Download PDF

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Publication number
EP2593739B1
EP2593739B1 EP11741665.1A EP11741665A EP2593739B1 EP 2593739 B1 EP2593739 B1 EP 2593739B1 EP 11741665 A EP11741665 A EP 11741665A EP 2593739 B1 EP2593739 B1 EP 2593739B1
Authority
EP
European Patent Office
Prior art keywords
tower
exchange
unit according
nitrogen
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11741665.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2593739A2 (fr
Inventor
Patrice Cavagne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Publication of EP2593739A2 publication Critical patent/EP2593739A2/fr
Application granted granted Critical
Publication of EP2593739B1 publication Critical patent/EP2593739B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/12—Particular process parameters like pressure, temperature, ratios
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box

Definitions

  • the present invention relates to a cooling assembly according to the preamble of claim 1 and known from the document EP-A-1666822 . It also relates to an apparatus and a process for air separation by air distillation comprising such a cooling assembly according to claims 1 and 14 respectively.
  • EP-A-1666822 shows the first and second laps arranged on the ground, the second tower being close to the exit of the main exchange line.
  • Pumps for transferring chilled water obtained in the second tower to the first tower are usually installed on the ground next to the second tower.
  • This second tower can be made of steel or concrete, of round or square section.
  • the pressure losses in the waste nitrogen line leaving the exchange line towards this second tower are critical because they fix the pressure of the low pressure column (and thus of the air compressor) which is only related to the second tower where the heat exchange between the nitrogen and the water takes place .
  • the tower of round or square section, will be installed in height, for example on the roof of the main exchange line to allow the residual nitrogen line to enter directly into the tower without elbows and with a minimum of length of pipe, these being generators of loss of load.
  • This tower may be steel, concrete or plastic.
  • the tower will preferably be supported by an extension of the structure of the envelope in which the exchange line is installed or by any other suitable support means.
  • the present invention it is possible to reduce the head losses by 3 mbar, thus reducing the pressure of the low pressure column by 3 mbar and that of the medium pressure column by 4mbar.
  • the air pressure is reduced as well and the power consumption of the air compressor drops by 0.1%.
  • a cooling assembly constituted by an exchange line capable of heating the nitrogen from a column system by heat exchange with the air to be cooled for the cooling system.
  • columns and a cooling tower allowing the exchange of heat and mass between water to be cooled sent to the top of the tower and nitrogen from a system of air distillation columns, the lower part of the tower comprising an inlet connected to a nitrogen pipe and the nitrogen pipe being connected to at least one exchanger body of the exchange line capable of heating the nitrogen from the column system by heat exchange with air to cool for the column system characterized in that the tower is disposed above at least a portion of the exchange line.
  • a cryogenic distillation air separation apparatus comprising an assembly according to one of claims 1 to 12, a column system, an air supply line to the exchange line, an air supply line of the exchange line and an air supply line from the exchange line to the column system, the nitrogen line being connected to the column system .
  • an air separation method by cryogenic distillation using an assembly according to one of claims 1 to 12 wherein air is cooled in a second tower and in the line. exchange, separated in a column system, the nitrogen is sent from the column system to the exchange line and the exchange line to the tower.
  • the pressure drop in the nitrogen line between the outlet of the exchanger body and the inlet of the tower is less than 7 mbar, preferably less than 6 mbar.
  • the cooling assembly comprises a tower 1, two low-pressure exchange lines 3A, 3B, a high-pressure exchange line 5.
  • the air separation apparatus further comprises air turbines 7, columns 9, 11 and a set of pipes and valves.
  • the air is cooled in a second tower (not shown) by direct contact with water, purified in a purification unit, cooled in the exchange lines 3A, 3B, expanded in at least one turbine 7 and sent to a column 9 to be separated. Fluids produced in column 9 are sent to column 11, which operates at lower pressure than column 9. The nitrogen produced, from column 11, heats up in the exchange lines 3A, 3B and is sent to the cooling tower 1 where it cools the water for cooling the air.
  • the exchange lines 3A, 3B are the fluid exchangers at low pressure and are separated by a space.
  • Each exchange line comprises a number of bodies (here eight) which receive air to cool and nitrogen to heat.
  • the heated nitrogen is collected in pipes 15 which open a few meters above the bottom of the tower 1.
  • the nitrogen pipe 15 is higher than the other pipes and therefore is easier to connect to the tower 1
  • the pressure drop on the nitrogen line 15 between the exchange body and the tower is less than 7 mbar, preferably less than 6 mbar.
  • Tower 1 is supported by a structure 13 which rests on the ends of the two exchange lines 3A, 3B.
  • Cooled water in the tower is used to cool the air upstream of the treatment.
  • the structure 13 will rest on the ground or another element.
  • the water inlet and outlet pipes are not shown in the figure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP11741665.1A 2010-07-13 2011-07-12 Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement Not-in-force EP2593739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1055722A FR2962799B1 (fr) 2010-07-13 2010-07-13 Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement
PCT/FR2011/051670 WO2012007691A2 (fr) 2010-07-13 2011-07-12 Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement

Publications (2)

Publication Number Publication Date
EP2593739A2 EP2593739A2 (fr) 2013-05-22
EP2593739B1 true EP2593739B1 (fr) 2017-04-12

Family

ID=43901357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11741665.1A Not-in-force EP2593739B1 (fr) 2010-07-13 2011-07-12 Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement

Country Status (6)

Country Link
US (1) US20130111950A1 (enrdf_load_stackoverflow)
EP (1) EP2593739B1 (enrdf_load_stackoverflow)
JP (1) JP5902161B2 (enrdf_load_stackoverflow)
CN (1) CN103299147B (enrdf_load_stackoverflow)
FR (1) FR2962799B1 (enrdf_load_stackoverflow)
WO (1) WO2012007691A2 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124853A2 (fr) * 2014-02-24 2015-08-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Appareil de séparation d'air par distillation cryogénique à plateforme surélevée
FR3052243B1 (fr) * 2016-06-06 2019-06-28 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Assemblage d'elements modulaires de construction d'un appareil d'echange de masse et/ou de chaleur et procede d'echange utilisant un assemblage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061478A (en) * 1979-10-23 1981-05-13 Air Prod & Chem Method and cryogenic plant for producing gaseous oxygen

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US4496382A (en) * 1983-03-21 1985-01-29 Air Products And Chemicals, Inc. Process using serpentine heat exchange relationship for condensing substantially single component gas streams
JPH0721378B2 (ja) * 1985-08-12 1995-03-08 大同ほくさん株式会社 酸素ガス製造装置
JP2551461B2 (ja) * 1988-07-04 1996-11-06 日本酸素 株式会社 空気分離装置における原料空気の前処理方法
US5275004A (en) * 1992-07-21 1994-01-04 Air Products And Chemicals, Inc. Consolidated heat exchanger air separation process
US20020067041A1 (en) * 2000-08-30 2002-06-06 Collins James Christopher Compressor air piping system and method
FR2844344B1 (fr) * 2002-09-11 2005-04-08 Air Liquide Installation de production de grandes quantites d'oxygene et/ou d'azote
US7296437B2 (en) * 2002-10-08 2007-11-20 L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for separating air by cryogenic distillation and installation for implementing this process
GB0307404D0 (en) * 2003-03-31 2003-05-07 Air Prod & Chem Apparatus for cryogenic air distillation
US6732544B1 (en) * 2003-05-15 2004-05-11 Praxair Technology, Inc. Feed air precooling and scrubbing system for cryogenic air separation plant
FR2858398B1 (fr) * 2003-07-30 2005-12-02 Air Liquide Procede et installation d'alimentation d'une unite de separation d'air au moyen d'une turbine a gaz
DE10342788A1 (de) * 2003-09-15 2005-04-07 Linde Ag Coldbox
EP1666823A1 (de) * 2004-12-03 2006-06-07 Linde Aktiengesellschaft Vorrichtung zur Tieftemperaturzerlegung eines Gasgemisches, insbesondere von Luft
FR2880418B1 (fr) * 2004-12-30 2007-04-27 Air Liquide Ensemble d'echangeurs de chaleur, appareil de distillation cryogenique incorporant un tel ensemble et procede de distillation cryogenique utilisant un tel ensemble

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061478A (en) * 1979-10-23 1981-05-13 Air Prod & Chem Method and cryogenic plant for producing gaseous oxygen

Also Published As

Publication number Publication date
EP2593739A2 (fr) 2013-05-22
FR2962799A1 (fr) 2012-01-20
WO2012007691A2 (fr) 2012-01-19
US20130111950A1 (en) 2013-05-09
CN103299147A (zh) 2013-09-11
JP5902161B2 (ja) 2016-04-13
WO2012007691A3 (fr) 2013-10-10
CN103299147B (zh) 2015-10-07
JP2014500937A (ja) 2014-01-16
FR2962799B1 (fr) 2014-07-04

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